<template>
  <form-item-wrapper
    :designer="designer"
    :field="field"
    :rules="rules"
    :design-state="designState"
    :parent-id="parentId"
    :parent-list="parentList"
    :index-of-parent-list="indexOfParentList"
  >
    <!-- el-upload增加:name="field.options.name"后，会导致又拍云上传失败！故删除之！！ -->
    <template v-if="previewStatus">
      <div
        v-if="!formData[fieldId] || formData[fieldId].length === 0"
        class="inner_value"
      >
        {{ "--" }}
      </div>
      <UploadList
        list-type="picture-card"
        disabled
        :files="formData[fieldId]"
        :handle-preview="handlePicturePreview"
      />
    </template>
    <el-upload
      v-else
      ref="fieldEditor"
      :disabled="field.options.disabled"
      :action="designer.uploadBase + realUploadURL"
      :headers="uploadHeaders"
      :data="uploadData"
      :with-credentials="field.options.withCredentials"
      :multiple="field.options.multipleSelect"
      :file-list="fileList"
      :show-file-list="field.options.showFileList"
      list-type="picture-card"
      :class="{ hideUploadDiv: uploadBtnHidden }"
      :limit="field.options.limit"
      :on-exceed="handlePictureExceed"
      :on-preview="handlePicturePreview"
      :before-upload="beforePictureUpload"
      :on-success="handlePictureUpload"
      :on-error="handleUploadError"
      :on-remove="handlePictureRemove"
    >
      <div v-if="!!field.options.uploadTip" slot="tip" class="el-upload__tip">
        {{ field.options.uploadTip }}
      </div>
      <i slot="trigger" class="el-icon-plus avatar-uploader-icon" />
    </el-upload>
    <!-- <el-tag>{{ designer.uploadBase + realUploadURL }}</el-tag> -->

    <el-dialog
      v-if="showPreviewDialogFlag"
      v-dialog-drag
      title=""
      :visible.sync="showPreviewDialogFlag"
      append-to-body
      width="60%"
      :show-close="true"
      custom-class="drag-dialog small-padding-dialog"
      :close-on-click-modal="true"
      :close-on-press-escape="true"
      :destroy-on-close="true"
    >
      <img :src="previewUrl" width="100%" alt="" />
    </el-dialog>
  </form-item-wrapper>
</template>

<script>
/* eslint-disable vue/require-default-prop */
/* eslint-disable eol-last */

// import UploadList from "element-ui/packages/upload/src/upload-list";
import UploadList from "./upload_list";
import FormItemWrapper from "./form-item-wrapper";
import emitter from "Yan/utils/emitter";
import i18n from "Yan/utils/i18n";
import { deepClone, evalFn } from "Yan/utils/util";
import fieldMixin from "./fieldMixin";

export default {
  name: "picture-upload_unit",
  componentName: "FieldWidget",
  components: {
    FormItemWrapper,
    UploadList,
  },
  mixins: [emitter, fieldMixin, i18n],
  props: {
    designer: Object,
    fieldId: String,
    parentId: String,
    parentList: Array,
    indexOfParentList: Number,
    formData: Object,
    designState: {
      type: Boolean,
      default: false,
    },
  },
  // inject: ["refList", "formConfig", "globalOptionData", "globalModel"],
  data() {
    return {
      oldFieldValue: null, // field组件change之前的值
      // fieldModel: [],
      rules: [],

      uploadHeaders: {},
      uploadData: {
        key: "",
      },
      fileList: [],
      uploadBtnHidden: false,

      previewUrl: "",
      showPreviewDialogFlag: false,
    };
  },
  computed: {
    realUploadURL() {
      const uploadURL = this.field.options.uploadURL;
      if (
        !!uploadURL &&
        (uploadURL.indexOf("DSV.") > -1 || uploadURL.indexOf("DSV[") > -1)
      ) {
        const DSV = this.getGlobalDsv();
        // console.log("test DSV: ", DSV);
        return evalFn(this.field.options.uploadURL, DSV);
      }

      return this.field.options.uploadURL;
    },
  },

  created() {
    /* 注意：子组件mounted在父组件created之后、父组件mounted之前触发，故子组件mounted需要用到的prop
         需要在父组件created中初始化！！ */
    // this.initFieldModel();
    // this.registerToRefList();
    this.initEventHandler();
    this.buildFieldRules();

    this.handleOnCreated();
  },

  mounted() {
    this.handleOnMounted();
    this.$watch(
      `formData.${this.fieldId}`,
      (n) => {
        // console.log(
        //   `${this.fieldId}`,
        //   n,
        //   n.map((i) => JSON.stringify(i))
        // );
        this.fileList = n;
      },
      { deep: true, immediate: true }
    );
  },

  methods: {
    handlePictureExceed() {
      const uploadLimit = this.field.options.limit;
      this.$message.warning(
        this.i18nt("render.hint.uploadExceed").replace(
          "${uploadLimit}",
          uploadLimit
        )
      );
    },

    handlePicturePreview(file) {
      this.previewUrl = file.url;
      this.showPreviewDialogFlag = true;
    },

    beforePictureUpload(file) {
      let fileTypeCheckResult = false;
      if (!!this.field.options && !!this.field.options.fileTypes) {
        const uploadFileTypes = this.field.options.fileTypes;
        if (uploadFileTypes.length > 0) {
          fileTypeCheckResult = uploadFileTypes.some((ft) => {
            return file.type === "image/" + ft;
          });
        }
      }
      if (!fileTypeCheckResult) {
        this.$message.error(
          this.i18nt("render.hint.unsupportedFileType") + file.type
        );
        return false;
      }

      let fileSizeCheckResult = false;
      let uploadFileMaxSize = 5; // 5MB
      if (!!this.field.options && !!this.field.options.fileMaxSize) {
        uploadFileMaxSize = this.field.options.fileMaxSize;
      }
      fileSizeCheckResult = file.size / 1024 / 1024 <= uploadFileMaxSize;
      if (!fileSizeCheckResult) {
        this.$message.error(
          this.i18nt("render.hint.fileSizeExceed") + uploadFileMaxSize + "MB"
        );
        return false;
      }

      this.uploadData.key = file.name;
      return this.handleOnBeforeUpload(file);
    },

    handleOnBeforeUpload(file) {
      if (this.field.options.onBeforeUpload) {
        const bfFunc = new Function("file", this.field.options.onBeforeUpload);
        const result = bfFunc.call(this, file);
        if (typeof result === "boolean") {
          return result;
        } else {
          return true;
        }
      }

      return true;
    },

    updateFieldModelAndEmitDataChangeForUpload(
      fileList,
      customResult,
      defaultResult
    ) {
      const oldValue = deepClone(this.formData[this.fieldId]);
      if (!!customResult && !!customResult.name && !!customResult.url) {
        this.formData[this.fieldId].push({
          name: customResult.name,
          url: customResult.url,
        });
      } else if (
        !!defaultResult &&
        !!defaultResult.name &&
        !!defaultResult.url
      ) {
        this.formData[this.fieldId].push({
          name: defaultResult.name,
          url: defaultResult.url,
        });
      } else {
        this.formData[this.fieldId] = deepClone(fileList);
      }
      // this.syncUpdateFormModel(this.formData[this.fieldId]);
      this.emitFieldDataChange(this.formData[this.fieldId], oldValue);
    },

    handlePictureUpload(res, file, fileList) {
      if (file.status === "success") {
        let customResult = null;
        if (this.field.options.onUploadSuccess) {
          const customFn = new Function(
            "result",
            "file",
            "fileList",
            this.field.options.onUploadSuccess
          );
          customResult = customFn.call(this, res, file, fileList);
        }
        // console.log(JSON.stringify(customResult));
        this.updateFieldModelAndEmitDataChangeForUpload(
          fileList,
          customResult,
          res
        );
        this.fileList = deepClone(fileList);
        this.uploadBtnHidden = fileList.length >= this.field.options.limit;
      }
    },

    updateFieldModelAndEmitDataChangeForRemove(file, fileList) {
      const oldValue = deepClone(this.formData[this.fieldId]);
      let foundFileIdx = -1;
      this.fileList.map((fi, idx) => {
        if (
          fi.name === file.name &&
          (fi.url === file.url || (!!fi.uid && fi.uid === file.uid))
        ) {
          /* 这个判断有问题？？ */
          foundFileIdx = idx;
        }
      });
      if (foundFileIdx > -1) {
        this.formData[this.fieldId].splice(foundFileIdx, 1);
      }

      // this.syncUpdateFormModel(this.formData[this.fieldId]);
      this.emitFieldDataChange(this.formData[this.fieldId], oldValue);
    },

    handlePictureRemove(file, fileList) {
      this.updateFieldModelAndEmitDataChangeForRemove(file, fileList);
      this.fileList = deepClone(fileList);
      this.uploadBtnHidden = fileList.length >= this.field.options.limit;

      if (this.field.options.onFileRemove) {
        const customFn = new Function(
          "file",
          "fileList",
          this.field.options.onFileRemove
        );
        customFn.call(this, file, fileList);
      }
    },

    handleUploadError(err, file, fileList) {
      if (this.field.options.onUploadError) {
        const customFn = new Function(
          "error",
          "file",
          "fileList",
          this.field.options.onUploadError
        );
        customFn.call(this, err, file, fileList);
      } else {
        this.$message({
          message: this.i18nt("render.hint.uploadError") + err,
          duration: 3000,
          type: "error",
        });
      }
    },
  },
};
</script>

<style lang="scss" scoped>
@import "../../../../styles/global.scss"; //* form-item-wrapper已引入，还需要重复引入吗？ *//

.full-width-input {
  width: 100% !important;
}

.hideUploadDiv {
  ::v-deep div.el-upload--picture-card {
    /* 隐藏最后的图片上传按钮 */
    display: none;
  }

  ::v-deep div.el-upload--text {
    /* 隐藏最后的文件上传按钮 */
    display: none;
  }

  ::v-deep div.el-upload__tip {
    /* 隐藏最后的文件上传按钮提示 */
    display: none;
  }
}
</style>
